This groundbreaking book demonstrates that between the results of the 1976 Viking I lander and the latest scientific discoveries - from fertile Martian soil to microbe-ridden meteorites - there is a powerful case for life on the Red Planet and beyond. Exploring what forms extraterrestrial life might take and where it may reside, We Are Not Alone provides a captivating tour of the Solar System and shows that it's much more crowded than we previously realised. Dirk Schulze-Makuch is Associate Professor in Astrobiology at Washington State University. David Darling is an acclaimed popular science writer and bestselling author.